I don't have an Android emulator, so I have no idea what this app does. However, there is an easy trick that I try for all executable challenges. I simply opened the file in a text editor and searched for flag{, and ended up here:
`Start date ??Start date – %1$s ??Start date – End date ??Submit query ??Switch to calendar input mode ((Switch to clock mode for the time input. ??Switch to text input mode --Switch to text input mode for the time input. ??Sym+ ??Tab Tap to switch to selecting a day !!Tap to switch to selecting a year Use: %1$s ??Voice search ??androidx.startup EEcom.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior CCcom.google.android.material.behavior.HideBottomViewOnScrollBehavior ;;com.google.android.material.bottomsheet.BottomSheetBehavior @@com.google.android.material.theme.MaterialComponentsViewInflater IIcom.google.android.material.transformation.FabTransformationScrimBehavior IIcom.google.android.material.transformation.FabTransformationSheetBehavior cubic-bezier(0.0, 0.0, 0.2, 1.0) cubic-bezier(0.0, 0.0, 1.0, 1.0) cubic-bezier(0.4, 0.0, 0.2, 1.0) cubic-bezier(0.4, 0.0, 1.0, 1.0) ??d ??delete ??enter &&flag{e2e7fd4a43e93ea679d38561fa982682} ??m TTpath(M 0,0 C 0.05, 0, 0.133333, 0.06, 0.166666, 0.4 C 0.208333, 0.82, 0.25, 1, 1, 1) `

APKs are slightly human-readable if you know what text/code you're looking for, as I did in this case. As you can see at the end of that snippet, the flag is flag{e2e7fd4a43e93ea679d38561fa982682}

I would also suggest you to read the better writeup from a smarter team over here: https://github.com/evyatar9/Writeups/tree/master/CTFs/2022-NahamCon_CTF/Mobile/Mobilize